Spring unit support and assembly

A coil spring supporting grid structure adapted for snap-in interconnection with a plurality of coil springs to form a spring unit assembly, said grid structure comprising a set of longitudinal and a set of transverse wires fixedly joined together at their intersections to define a substantially planar grid, said wires having coil-engaging formations intermediate said intersections extending transversely with respect to said grid plane, with each corresponding pair of coil-engaging formations of adjacent longitudinal wires extending in one direction with respect to said grid plane, and each corresponding pair of coil-engaging formations of adjacent transverse wires extending in the opposite direction with respect to said grid plane, whereby an end convolution of a coil spring may be snapped in place under one corresponding pair of coil-engaging formations and over the other corresponding pair of formations, said coil-engaging formations having opposed end sections which are angularly disposed with respect to both the grid plane and the direction of displacement and are adapted to wedgingly engage the coil spring's convolution.

A spring unite assembly comprising a plurality of coil springs arranged in a plurality of aligned longitudinal columns and transverse rows, coil spring supporting means connected to said coil springs at one side of said assembly and a coil spring supporting grid structure connected to said coil springs at the other side of said assembly, said grid structure comprising a set of longitudinal and a set of transverse wires fixedly joined together at their intersections to define a substantially planar grid, wires having coil-engaging formations intermediate said intersections extending transversely with respect to said plane, with each corresponding pair of coil-engaging formations of adjacent longitudinal wires extending in one direction with respect to said plane, and each corresponding pair of coil-engaging formations of adjacent transverse wires extending in the opposite direction with respect to said plane, with the coil-engaging formations of both sets of wires being adapted to engage the interior of an end convolution of a coil spring, whereby the end convolution of a coil spring may be snapped in place under one corresponding pair of coil-engaging formations and over the other corresponding pair of formations.